/Engine/Plugins/Animation/LiveLink/Source/LiveLink/Public/LiveLinkBlueprintLibrary.h
Whether or not the client has a subject with this name enabled Only 1 subject with the same name can be enabled. At the start of the frame, a snapshot of the enabled subjects will be made. That snapshot dictate which subject will be used for the duration of that frame.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="LiveLink") static bool IsLiveLinkSubjectEnabled ( const [FLiveLinkSubjectName](API\Runtime\LiveLinkInterface\FLiveLinkSubjectName) SubjectName )